Sink-drain.



R. CLARK.

I SINK DRAIN. APPLICATION HLED AUG.22| 19H.

Patented May 1, 1917.

Z0 1 Wm.

sin ks.

SIN K-DRAIN Specification of Letters Patent.

Patented May i 1917.

Application filed August 22, 1914. Serial No. 858,147.

e it known that I, Ronnn'r CLARK, a citizen of the United States,residin in the city of Bridgeport, county of Fair-field, and State ofConnecticut, have invented certain new and useful Improvements in Sink-Drains, of which the following is a full, clear, and exact description.

This invention relates to a drain or waste fixture, especiallyapplicable to kitchen but my improvements to this particularapplication.

he prnnary object of the invention is to provide a simple, etlicientdrain fixture. in which. the strainer may be very readily inserted into,and removed from, the outlet bushing or shell in the sink bottom, andwherein an ordinary stopper of rubber, or the like, may be readilysubstituted for the strainer when it is desired to fill the sink withwater. It is also proposed fixture of the type indicated in which thelocking of the strainer in operative position, and its removal fromoperative position. are facilitated by the use of a bayonet joint ofspecial form. It is further proposed to provide a drain fixture in whicha bayonet joint for locking a strainer in position in the mouth of thebushing does not interfere in any way with the use of an ordinary rubberstopper, when the strainer is removed.

these and other ends, the invention consists in the novel features andcombinations of parts to be hereinafter described and claimed. 1

In the accompanying drawing.

Figure 1 is a fragmentary side elevation of a drain fixtureembodying myimprovements;

Fig. 2 is a top plan view of the same, showing the strainer locked inposition in the shell or bushing;

Fig. 3 is a section on line 33 of Fig. 2, showing the locked position ofthe strainer;

*ig. 4 isa section similar to Fig. 3, but with the sectional part of thestrainer turned to a position to release and elevate the strainer; V

Fig. 5 is a side elevation of the strainer, detached; and

Fig. 6 is a section similar to Fig. 3, showing an ordinary rubberstopper fitted in the'bushing in place of the strainer.

bushing, cup,

are not limited to furnish a of the bushing very gradually, for

the drawing, 10 is an outlet shell or plug. adapted to be secured in theusual manner in an opening in the bottom of the sink. and having theusual substantially horizontal annular flange 11. adapted to overlie thebottom wall of the sink around the opening formed in the latter. A-nut10 engaging the screw threads Referring to 12 on the exterior of thebushing. is adapted to clamp the bushing in place, and the lower end ofthe bushing has secured thereto in any suitable manner the customarywaste pipe 13, as shown in Fig. 1. This bushing is adapted to receive astrainer 14 (Fig. 5) which may be locked in the upper end of the same.with its upper surface approximately flush with the flange 11. In theform shown, the strainer 14 is adapted to be accommodated in a specialseat 15. formed at the upper part of the bushing or shell. for whichpurpose the upper end portion of the bushing is made of greater diameterthan the lower portion. The wide upper portion is connected with therelatively narrow lower portion by means of an approximately horizontalwall 16 forming a shoulder to seat th 2 annular vertical wall 14 withwhich the strainer is provided. By preference, the plug or bushing will.be made of sheet metal. and the shoulder 16 will be formed by a suitabledrawing operation.

In the embodiment which I have selected for illustration, the bayonetjoint for lock ing the strainer 14 in the seat of the bnslr ing isconstructed as follows: The wall of the upper. wider provided with aseries of inwardly disposed projections or teats 1?. In the form shown,these projections or teats 17 are three in number, but of course this isnot essential. and they are formed by displacing the metal of thebushing wall in an inward direction. but this likewise is not alwaysessential. In any event, the'teats or projections are relativelyshallow, and merge into the'side wall a. purpose hereinafter pointedout. The depending annular side wall 14 of the strainer 14 is providedwith a plurality of notches 18 adapted to cooperate with the respectiveprojections 17 in such a manner as to form a bayonet joint, so that thestrainer may be locked in the bushing in an obvious manner.

portion of the bushing In looking the strainer, the latter is given apartial rotation or turning movement relative to the plug or bushing, sothat after the mouths of the notches 18 pass over the respectiveprojections 17, the strainer may be turned to engage the projections inthe closed ends of the notches, whereby upward displacement of thestrainer is prevented. 'lo release the strainer, the latter is turned inthe opposite direction until the mouths of the notches come intoregister with the respective projections 17, after which the strainermay be readily lifted out of place. Furthermore, the bayonet joint ispreferably so constructed that it is effective in pulling the strainerdown into its seat when the. strainer is applied. Moreover, what is moreimportant, the bayonet joint is preferably so constructed that whenthestrainer is partially turned to release the same, said strainer isautomatically lifted to a certain extent, so that its upper surface willbe raised substantially above the level of the sink bottom, thusfacilitating the removal of the strainer. In order to effect these ends,each of the notches 18 is slanted with respect to the vertical, so as toprovide an upper inclined edge 18, and a lower inclined edge 18*. \Vhenthe strainer. is in the released position shown in turned clockwise, thelower inclined surface '18, by engaging the corresponding projection 17pulls the strainer down into its seat 15. as the strainer is turned toengage the projections in the closed ends of the notches. This looks thestrainer, as shown in Fig. 3, and in this position, each projection orteat 17 engages a relatively enlarged seat 18 at the closed end of theoorres onding notch. When it is desired to unloc the strainer, the sameis turned in a counter-clockwise direction, whereupon the upper inclinedwall 18' of each notch will ride on the corresponding projection 17 insuch a manner as to raise the strainer relative to the bushing, as shownin Fig. 4. When the strainer is in the position for each notch 18 topass clear-of the corres onding teat or projection, the.' upper sur beconsiderably elevated relative to the bottom of the sink, and thus theremoval of the strainer from facilitated.

For the purpose of permitting the necessary turning movement of thestrainer, the latter 'is preferably provided with a dia metrical slot19, into which a knife, or other tool, maybe readily inserted. Byinserting the knife in the slot 19-, and turning the strainer in theproper direction, the latter may be either locked or released.

Preferably the strainer will be formed of a sheet metal plate, having aplurality of perforations in its upper surface, as shown, the upperportion being integral with the the bushing is very much nary rubberstopper adapted to engage Fig. 4:, and s ace of the strainer willdownturncd side wall 11, but in certain aspects of the invention this isnot essential. \Vhen it is desired to fill the sink, an ordifor thestrainer 14. The stopper 20 will fit the seat 15 when the strainer isremoved, as shown in Fig. (3, and the yielding nature of the stopperwill permit it to conform very to the small teats or projections 17 onthe inside surface of the seat 1:"), so that there will be no leakage.By preference, the side wall of the seat 15 will-have a very slightbevelor taper, as shown, but this is not necessary in all cases.

It will be observed that the inwardly directed shoulderlfi underlies thestopper or the strainer disk when it is inserted into the closely seat15. The peripheral wall or other deon the strainer disk is the surfaceof the stopper scat above and in line with the shoulder, theconstruction preferably being such that when the depending portion onthe periphcry of the strainer disk is substantially in contact with theshoulder 16, the upper surface of the strainer disk is substantiallyflush with the lateral flange on the'bushing. \Vith this construct-ionthe bayonet lock or its equivalent can be dispensed with in some casesif desired, in which event the shoulder will hold thestrainer diskinthe'proper position vertically with respect to the bushing.

By the construction described, the drain fixture may be produced, veryinexpensively from sheet metal and yet it is strong and durable, andpresents the'advantage of permitting the substitution of a radiallyinsertible and removable strainer for an ordinary stopper' or plu andvice versa. The mere turning of the strainer relative to the projectionson the bushing raise. and lowers it on its seat, and yet theconstru tionis Such that an ordinary rubber stopper will readily fit the bushingwithout leakage when the strainer has been taken out.

I do not claim broadly 'herein the combination of a bushing adapted toextend through an opening in the bottom of the sink, said bushing havinga smooth substantially upright seat at the upper end or mouth thereofadapted to make water tight contact with an ordinary plug or stopperhaving a beveled seating surface, a strainer adapted to fit the upperportion of said stopper seat when the plug or stopper is removed, saidstrainer being of a diameter substantially equal to the maximum diameterof the stopper seat, means for detachably engaging said strainer with apart of the bushing tosecure the strainer detach ably in position, and alaterally projecting flange on the upper end of the bushin whichoverlies the bottom wall of the sink around theopening tions the bushingwith respect to the sink pending portion- .20 may be substituted in thelatter, and posi-.

- the stra iner securing means being stopper seat, a downturned on saidstrainer when the stopper is in use as well as when is in use, asclaimed in my applicationSerial No. 817,916.

Without limiting myself to the construction shown, I claim:

In a drain fixture such as described, the combination of a bushinghaving a laterall projecting flange on. the upper end thereo a nutengaging said bushing to clamp said flange'a'gainst the upper surface ofthe sink bottom, said bushing upper end or mouth thereof provided with asubstantially smooth ordinary plug or stopper, a strainer disk of 1 adiameter substantially equal to the diameter of the upper said stopperseat, and means for securing said portion of detachably strainer in saidseat without interfering with a water tight fit of the said seat whenstitutcd for plug or stopper in said plug or stopper is subthe strainer,said strainerso constructed that the strainer is released from thebushing, for removal, by turning the strainer in said seat;substantially as described. L. In a drain fixture for sinks and thelike, the combination of a bushing having a laterally projecting flangeon the upper end thereof, adapted to overlie the bottom Wall of the sinkaround the a nut to clamp the said flange against the upper surface ofthe sink bottom, said bushing having a Seat at the upper end or mouththereo '1- proyided with a substantially smoot surface tov receive anordinary plug diameter subin said seat when said plug substituted fordescribed. 3. In a drain fixture for sinks and the like, the combinationof a bushing having a laterally projecting flange on the upper endthereof, adapted to overlie the bottom Wall of the sink around theopening in the latter, means carried by the bushing for clamping saidflange against the bottom, said bushing having a seat at an ordinaryplug or stopper, the surface of said stopper seat beingsubstantiallysmooth as to make a water tight fit with the stopper, a strainer diskadapted to fit the upper portion of said peripheral wall disk adapted tofit Within the smooth surface of said stopper seat, and means fordetachably securing the strainer in said stopper seat Withoutinterfering with having a seat at'the- A thereof to make water tightcred as it is turned the strainer; substantially as that the strainerthe water tight fit of the stopper in said seat when it is substitutedfor the strainer, said strainer securing-means including small teats orprojections on the seat surface merg-' ing gradually into the smoothportion of said surface, and cooperating with notches in the dependingwall of the strainer, said notches so formed that the strainer is raisedand lowered as it is turned on its axis; substantially as described.

4:. In a drain fixture for sinks the combination of a bushing adapted toextendthrough an'opening in the bottom of the sink and having exteriorscrew threads for a nut adapted to clamp the bushing in place in thesink bottom, a lateral flange projecting horizontally from the upper endof said bushing to overlie the bottom wall of the sink around theopening in said wall, said bushing having a smooth, substantiallyupright seat at the upper end or mouth and the like,

stantially throughout its area with an ordi- 'nary'plug or stopperhaving a slightly beveled seating surface, a strainer disk of a diametersubstantially equal to the diameter of the mouth of the bushing, andmeans for detachably engaging said strainer disk with apartof thebushing to secure the strainer detachably n said seat when the stopperis removed, said engaging means being so constructed that the straineris raised and lowin said seat substantially as described.

5. In a drain fixture for sinks and the like, the combination of abushing, having a laterally projecting flange on the upper end thereof,adapted to overlie the bottom wall of th v latter, said bushing having aseat upper end thereof with receive an ordinary plug or stopper with awater tight fit, a strainer insertible into said seat when the stopperis removed, and means for securing said strainer in said seat, such israised and lowered as it is turned on its axis, without interfering withthe water tight fit of the stopper in said seat when it is substitutedfor the strainer, said securing-means including small teats orprojections on the surface of the combined stopper and strainer seat 10-at the a nut on the bushing, to clamp a smooth surface to against theupper surface of the sink of the upper portion o l; the stopper seatadapted to be freely inserted into and removed from said stopper seat atany time when the stopper is removed, a wall depending from that portionof the strainer disk which is of maximum diameter, and means fordetachably securing said strainer in said seat without interfering witha water tight fit of the plug or stopper in said seat when said plug orstopper is substituted for the strainer, comprising means for connectingsaid depending wall with the bushing, such that the strainer is lockedand released by a turning moven'ient thereof; substantially asdescribed.

7. In a drain fixture such as described, the combination of a bushinghaving a laterally projecting flange at the upper end thereof, means forclamping said flange bottom, said bushing having a substantially smoothupright seat at the upper end or mouth thereof to make watersubstantially throughout its area with an ordinary plug or stopperhaving a slightly beveled seating surface, a strainer adapted to fitwithin said stopper seat, and means for detachably securing saidstrainer in said seat without interfering with a water tight fit of theplug orstopper in said seat when said plug or stopper is substituted forthe strainer, said strainer-securing means so constructed and arrangedthat the strainer is locked and released by turning it in said seat;substantially as described.

8. In a drain fixture for sinks and the like, the combination of abushing having a laterally projecting flange at the upper end thereof,means for clamping said flange against the upper surface of the sinkbottom, said bushing having a substantially smooth upright seat at theupper end or mouth thereof to make water tight contact substantiallythroughout its area with an ordinary plug or stopper having a slightlybeveled seatin surface, the bushing being of reduced diameter closelystopper seat to present an inwardly projecting shoulder, a strainer diskadapted to fit within said stopper seat in place of said stopper, andmeans for detachably support ing said strainer disk in said seat withoutinterfering with a water tight fit of the stopper in said seat when itis substituted for the strainer disk, said strainer disk-supportingmeans comprising a depending portight contact beneath said tion on theperiphery of said disk adapted to engage the surface of said'stopperseat above and in line with said shoulder when the strainer is in theoperative position; substantially as described.

9. In a drain fixture for sinks and the like, the combination of abushing adapted to eX- tend through an opening in the bottom of the sinkand having exterior screw threads for a nut adapted to clamp the bushingin place in the sink bottom, a flange projecting laterally from theupper end of said bushing to overlie the bottom wall of the sink aroundthe opening in said Wall, said bushing having a substantially smoothupright seat at the upper end or mouth thereof to make water tightcontact substantially throughout its area with an ordii'iary plug orstopper having a. slightly beveled seating surface, a strainer disk of adiameter substantially equal to the diameter of the mouth of the bushingadapted to fit within said stopper seat when the stopper is removed, saibushing having a shoulder below and in close proximity to said stopperseat, and a depending portion on the periphery of said strainer diskadapted to engage the surface of said stopper seat and of such depth asto lie wholly above said shoulder when the strainer is substantiallyflush with said lateral flange; substantially as described.

10. In a drain fixture for sinks and the like, the combination of abushing adapted to extend through an opening in the sink bottom, saidbushing having a substantially smooth seat at the upper end or mouththereof adapted tomake water tight contact with an ordinary plug orstopper, a strainer disk adapted to fit, said stopper seat when the plugor stopper is removed, means for detachably engaging said straincl' diskwith a part of the bushing to hold said disk detachably in position, anoutwardly projecting flange on the upper end of the bushin saidbushingof reduceddiameter immediately below said seat so as to presentan inwardly projecting shoulder which underlies the stopper or thestrainer disk when itis inserted into said seat; substantially asdescribed.

In witness whereof, I have hereunto set my hand on the 17th dayofAugust, 191- ROBERT CLARK.

Witnesses C, A. BALDWIN, EUG. O. MILLER.

